[Editor's note:This item has been updated since it was originally posted.]

Dallas Mayor Mike Rawlings told the council earlier this week that the investigation into the creation of the ordinance intended to permanently park app-ordered car service Uber won't be ready until October 23. The investigation is being led by former Dallas County District Attorney Bill Hill, who has been tasked, at the cost of no greater than $50,000, with finding out what led to the creation of the extensive city code rewrite and how it landed on the council's voting agenda at the end of August without any prior discussion.

As we reported previously, the answer is clear: Yellow Cab attorney John Barr convinced interim city manager A.C. Gonzalez and assistant city manager Joey Zapata to protect his clients by clamping down on Uber. City Hall ordered Dallas Police Chief David Brown to use undercover vice officers to ride with and cite city-licensed drivers who were dispatched via the app.

But emails obtained by The Dallas Morning News reveal that in the months before she stepped down as Dallas city manager, Mary Suhm was also involved in the Uber clampdown. And Rawlings was at least aware discussions about Uber were taking place.

From the looks of the 293-page-tall stack of emails and documents, Barr first reached out to Gonzalez on October 9, 2012: "Call Barr," said the missive. "Important." Barr said he needed 30 minutes to talk. Gonzalez had his assistant put him on the schedule "asap." At that point, Barr began complaining to Gonzalez that the city was failing to enforce its own rules governing limo services.

Initially, sources indicated that Barr communicated solely with Gonzalez and Zapata. But emails make it very clear that Mary Suhm, who was the city manager until July 1 and who even now has her old office at Dallas City Hall, was deeply involved in the discussions.

At 6:30 a.m. February 1, Suhm sent Zapata a note saying she needed an "update on Uber situation before I see mayor at nine this am." Zapata replied 37 minutes later that in late November, "the City notified Uber by letter that they lacked the necessary operating authority granted by the City to operate in Dallas." He also told her that in December, Code Compliance sent to "all taxi and limo drivers" a note that said, in short, "using Uber to arrange for transportation for hire is a violation of City Code due to inconsistent rates, type of metering devices, lack of operating authority and other violations."

Uber, unlike a cab company, uses no meter. Passengers are notified of their rates via their smartphone.

Zapata told Suhm of a mid-January meeting with Uber representatives who dismissed the city's claims that the service skirted city law. "Staff is verifying" those claims, Zapata told his boss in that February 1 email.

Three weeks later, Suhm again wanted to know "what is going on with Uber? and what are we doing with it?" Zapata reiterated that the city was confirming with the limo companies "that Uber is their partner. I do not expect them to confirm this."

That wasn't good enough for Suhm, who responded, "That's where we were the last time I asked.....need some progress here."

On March 26, Suhm received an email from Carol and Laura Reed, the powerful City Hall lobbyists hired by Yellow Cab to shut down Uber. The letter was actually written by Laura to her mother, Carol. Laura asks for some advice about how to proceed in order to "avoid" taking the issue to the "council level." Laura was frustrated that after five months of asking the city to do something about Uber, "not one citation has been issued to either a driver or to UBER."

Laura said she "requested" the city take action by, among other things, ticking UBER "for each day operating without an operating authority" dating back to September 14; ticketing drivers; and ticketing the company "for advertising without an operating license." She also wanted the city to "have [UBER's] website pulled down."

Suhm told Carol Reed that "I got onto them about no enforcement. We'll get on it." Carol responded, "Great thanks Mary I will tell them." Suhm sent Reed's email to Zapata.

The next day Zapata told Suhm that "staff is issuing a citation directly to Uber for advertising a transportation for hire service without operating authority" -- a citation that a jury would ultimately toss after a daylong hearing in municipal court in August. He also promised that staff was about to begin issuing citations to individual drivers, which had already begun in February after John Barr's office had a private investigator start booking rides with the Uber app.

On May 7, Suhm received an email from the Turtle Creek Chorale that said it was providing complimentary transportation to and from its Turtle Ball using Uber. She forwarded that to Zapata, along with the note, "What is going on with Uber?" She followed up 11 days later.

On May 18, Zapata told her that "as we find their ads, we're working with the attorneys to figure out which ones can be effectively prosecuted. We're picking our battles."

Suhm's response: "K thx."

On June 3, Pizza Hut exec Sam Khoury sent Rawlings, the former Pizza Hut CEO, an email about Uber offering discounted rides to and from the 5th Annual Pink Party, a breast-cancer awareness fundraiser. Rawlings forwarded it to Suhm, with a note that said, "A little support for your case they are acting like 'they' are providing the transport." Suhm then sent that note to Zapata.

We asked the mayor's spokesman Sam Merten why the mayor was looped into to a conversation about Uber. He offered this response via email:

“At the time of his email to Mary Suhm, Mayor Rawlings was aware that she was in the process of attempting to determine if Uber is a technology company as it claims or whether it’s a transportation company as she believes. The Mayor’s note to her merely suggested that the information he received from Mr. Khoury might support her belief.

"Mayor Rawlings was unaware that an ordinance was being crafted by the City Manager’s Office and had no knowledge whatsoever of any efforts on behalf of the Dallas Police Department related to this matter until it was reported by The Dallas Morning News.”

On June 6, Barr told Gonzalez and Zapata that Uber was "soliciting" for its UberX spin-off, a less-expensive ride-sharing option it uses in other cities ... including Dallas as of just a few days ago.

"It will damage regulated taxi operations," Barr told the city managers. "Could we sit down with each other and bring in the assistant city attorneys prosecuting and civil lawyers as well."

On July 5, four days after Suhm had officially stepped down as city manager, Dallas Police Deputy Chief Christina Smith gave Gonzalez an update about the department's ongoing undercover operation: Ten drivers were given 20 citations, she said, with "an identical operation" following on the to-do list.

But none of this was good enough for Yellow Cab's attorney, who'd grown tired of seeing Uber ads on the web and in his in-box.

"The $40,000 a month my client pays is too much given the lack of protection for this type of unlawful rogue behavior," Barr wrote Zapata and Gonzalez on July 16. "Nothing personal, I'm getting very angry in the uber intrusion and your departments lack of protection, What will it take. Bankruptcy of the cabs? Come on, get DPD to write tickets to Uber or stop charging permits to the cab company's. This isn't right! This is your area of responsibility."

Two weeks later, Gonzalez and Zapata exchanged emails concerning the proposed ordinance change, which would effectively shut down Uber by demanding, among other things, that drivers are dispatched solely by radio and not smartphone. And users would no longer be able to order a car when they needed one, as reservations would be required at least 30 minutes in advance. The city also wanted to "require a minimum fare of $70" and up the price of new cars from $35,000 to $45,000.

Sources have indicated that Barr helped write those rules into the proposed ordinance.

"The recently produced records prove once again that Yellow Cab and its lobbyist and lawyers are the ones directing the prosecution of private citizens," says Joel Reese, the attorney representing the drivers cited during the city's sting operations. "These records show the unsavory influence that Yellow Cab's hired guns had over the process."